Platform balance IFB series Legal for Trade EC Type Approved, 2/5 g, 6000/15000 g, IFB 15K2DM
Table of contents
Loading...KERN Platform balance IFB series Legal for Trade EC Type Approved, 2/5 g, 6000/15000 g, IFB 15K2DM User guide
KERN & Sohn GmbH
Ziegelei 1
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Internet: www.kern-sohn.com
Operating and Installati on Instructions
Display devices
KERN KFB / KFN-TAM
Version 3.2
02/2018
GB
D-72336 Balingen
Fax: +49-[0]7433-9933-149
KFB/KFN-TAM-BA_IA-e-1832
KERN KFB/KFN -TAM
Display units
GB
Version 3.2 02/2018
Operating and installa t ion instructions
Contents
1 Technical data ................................................................................................ 4
2 Appliance overview ....................................................................................... 5
2.1 Keyboard overview ..................................................................................................................... 7
2.1.1 Numerical input via the navigation buttons................................................................................. 8
2.2 Overview of display .................................................................................................................... 9
3 Basic Information (Gen eral) ........................................................................ 10
3.1 Proper use ................................................................................................................................ 10
3.2 Improper Use ............................................................................................................................ 10
3.3 Warranty ................................................................................................................................... 10
3.4 Monitoring of Test Resources .................................................................................................. 11
4 Basic Safety Precauti o ns ............................................................................ 11
4.1 Pay attention to the instructions in the Operation Manual........................................................ 11
4.2 Personnel training ..................................................................................................................... 11
5 Transport and storage ................................................................................. 11
5.1 Testing upon acceptance ......................................................................................................... 11
5.2 Packaging / return transport ..................................................................................................... 11
6 Unpacking and placing ................................................................................ 12
6.1 Installation Site, Location of Use .............................................................................................. 12
6.2 Unpacking and placing ............................................................................................................. 12
6.3 Scope of delivery / serial accessories: ..................................................................................... 12
6.4 Transportation lock (illustration example) ................................................................................. 13
6.5 Error message .......................................................................................................................... 13
6.6 Mains connection ...................................................................................................................... 14
6.7 Storage battery operation (optional) ......................................................................................... 14
6.8 Adjustment ................................................................................................................................ 15
6.8.1 Verified weighing systems ........................................................................................................ 15
6.8.2 Non verifiable weighing syst ems .............................................................................................. 18
6.9 Linearization ............................................................................................................................. 19
6.9.1 Verified weighing systems: ....................................................................................................... 19
6.9.2 Non-verified weighing systems ................................................................................................. 20
6.10 Verification ................................................................................................................................ 21
7 Operation ...................................................................................................... 24
7.1 Start-up ..................................................................................................................................... 24
7.2 Switching Off ............................................................................................................................ 24
7.3 Zeroing ..................................................................................................................................... 24
7.4 Simple weighing ....................................................................................................................... 24
7.5 Switch-over weighing unit (only not verifiable weighing systems) ........................................... 25
2 KFB/KFN-TAM-BA_IA-e-1832
7.6 Weighing with tare .................................................................................................................... 26
7.7 Weighing with tolerance range ................................................................................................. 27
7.7.1 Tolerance check for target weight ............................................................................................ 28
7.7.2 Tolerance check for target quantity .......................................................................................... 30
7.8 Manual totalizing ....................................................................................................................... 32
7.9 Automatic adding-up ................................................................................................................. 34
7.10 Parts counting ........................................................................................................................... 35
7.11 Animal weighing ....................................................................................................................... 36
7.12 Lock keyboard .......................................................................................................................... 37
7.13 Display background illum inatio n ............................................................................................... 37
7.14 Automatic switch-off function „AUTO OFF“ .............................................................................. 38
8 Menu ............................................................................................................. 39
8.1 Overview non verifiable weighing systems (contacts of circuit board [K1] not short-circuited) 40
8.2 Overview verified weighing systems (contacts of circuit board [K1] short-circuited by means of
jumper) 43
9 Service, maintenance, disposal .................................................................. 47
9.1 Clean ........................................................................................................................................ 47
9.2 Service, maintenance ............................................................................................................... 47
9.3 Disposal .................................................................................................................................... 47
9.4 Error messages ........................................................................................................................ 47
10 Data output RS 232C ................................................................................... 49
10.1 Technical data .......................................................................................................................... 49
10.2 Printer mode / Printout examples (KERN YKB-01N) ............................................................... 50
10.3 Output log (continuous output) ................................................................................................. 52
10.4 Remote control instructions ...................................................................................................... 52
10.5 I/O-Function .............................................................................................................................. 53
11 Instant help ................................................................................................... 54
12 Installing display unit / weighing bridge .................................................... 55
12.1 Technical data .......................................................................................................................... 55
12.2 Weighing system design........................................................................................................... 55
12.3 How to connect the platform ..................................................................................................... 56
12.4 Configure display unit ............................................................................................................... 57
12.4.1 Verified weighing systems (contacts of circuit board [K1] short-circuited by means of
jumper) 57
12.4.2 Non verifiable weighing systems (contacts of circuit board [K1] not short-circ u it ed ) .......... 63
13 Annex ............................................................................................................ 67
13.1 Dimensions Support base / wall bracket .................................................................................. 67
14 Declaration of Conformity / Examination Certificate ................................ 68
KFB/KFN-TAM-BA_IA-e-1832 3
1 Technical data
KERN (Type) KFB-TAM KFN-TAM
Trademark KFB-TM KFN-TM
Display 5 ½ - digit
Resolution (verified) 6000
Single (Max.) 6.000 e
Dual (Max.) 3.000 e
Resolution (non-verified) 30.000
Weighing ranges 2
Divisions 1,2,5,…10n
Weighing Units kg
Functions
Display LCD 52 mm digits with back lighting
DMS weighing cells
Range calibration We recommend ≥ 50 % max.
Data output RS232
Electric Supply
Housing 250 x 160 x 58 266 x 165 x 96
Admissible
ambient temperature
Net weight 1.5 kg 2 kg
Rechargeable battery
(optional)
Operating / charge time
Weighing with tolerance range, Totalizing, Animal
weighing
80-100 Ω. Max. 4 item per 350 Ω;
Sensitivity 2-3 mV/V
Input voltage 220 V – 240 V, 50 Hz
Power pack secondary voltage 12V, 500mA
0°C – 40°C (non-verified)
-10°C – 40°C (verified)
35 h / 12 h 90 h / 12 h
RS 232 interface Standard Option
Tripod KERN BFS-07, option
Support base
incl. wall bracket
IP protection -
4 KFB/KFN-TAM-BA_IA-e-1832
Standard
IP 67 as per DIN 60529
(rechargeable batter y
operation only)
2 Appliance overview
KFB-TAM: Synthetic finish
1. Status of rechargeable battery
2. Keyboard
3. Weight display
4. Tolerance margin, see chap. 7.7
5. Weighing unit
6. RS-232
7. Input connection load cell cable
8. Guide rail support base / stand
9. End stop support base / stand
10. Mains adapter connection
11. Adjustment switch
KFB/KFN-TAM-BA_IA-e-1832 5
KFN-TAM: Stainless steel finish
1. Status of rechargeable battery
2. Keyboard
3. Weight display
4. For tolerance mark see chap. 7.7
5. Weighing unit
6. Input connection load cell cable
7. Mains adapter connection
6 KFB/KFN-TAM-BA_IA-e-1832
2.1 Keyboard overview
Key Function
• Turn on/off
• Zeroing
Navigation button
Navigation key
Navigation key
Navigation key
C
• Confirm entry
• Taring
• At numeric input increase flashing digit
• Scroll forward in menu
• Display sum total
• Digit selection to the right
• Add weighing value to summation memory
• Digit select ion to the left
• Calculate weighing data via interface
• Delete
• Change between gross and net weight
ESC
KFB/KFN-TAM-BA_IA-e-1832 7
• Back to menu/weighing mode
• Call up animal weighing function
• Call up weighing with tolerance range
• Delete total added memory
2.1.1 Numerical input via the navigation buttons
Press and current setting will be displayed. The first digit will be flashing
and is ready for changing.
If you do not wish to change the first digit, press and the second digit will
start flashing.
Each time you press , the display will move to the subsequent digit, after the
last digit the display will return to the first digit.
To change the selected (flashing) digit, press repeatedly until the desired
value is displayed. Then press to access further digits and change them by
.
Complete your entry by .
8 KFB/KFN-TAM-BA_IA-e-1832
+ / / -
2.2 Overview of display
Display Significance
Weighing range 1
Weighing range 2
Battery very low
STABLE Stability display
ZERO Zero indicator
GROSS Gross weight
NET Net weight
AUTO Automatic add-up enabled
Kg Weighing unit
M+ Totalisation
LED
KFB/KFN-TAM-BA_IA-e-1832 9
Indicators for weighing with tolerance range
3 Basic Information (General)
3.1 Proper use
The display unit acquired by you is used in combination with a weighing plate and
serves to determine the weighing value of material to be weighed. It is intended to be
used as a “non-automatic weighing system”, i.e. the material to be weighed is
manually and carefully placed in the centre of the weighing plate. As soon as a stable
weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use display unit for dynamic weighings. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the display unit. (Example: Slowly
draining fluids from a container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the weighing
plate, minus a possibly existing tare load, must be strictly avoided. Both, the weighing
plate and the display unit may be damaged during this process.
Never operate display unit in explosive environment. The serial version is not
explosion protected.
Changes to the display unit's design are not permitted. This may lead to incorrect
weighing results, safety-related faul ts and des tr uct ion of the display unit.
The display unit may only be operated in accordance with the described default
settings. Other areas of use must be released by KERN in writing.
3.3 Warranty
Warranty claims shall be voided in case
• Our conditions in the operation manual are ignored
• The appliance is used outside the described uses
• The appliance is modified or opened
• Mechanical damage or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
10 KFB/KFN-TAM-BA_IA-e-1832
3.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the display
unit and, if applicable, the testing weight, must be checked regularly. The responsible
user must define a suitable interval as well as type and scope of this test. Information
is available on KERN’s home page (www.kern-sohn.com with regard to the
monitoring of display units’ test substances and the test weights required for this. In
KERN’s accredited DKD calibration laboratory test weights and display units may be
calibrated (return to the national standard) fast and at moderate cost.
4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN balances.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 T ransport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 Packaging / return transport
Keep all parts of the original packaging for a possibly
required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove
loose/mobile parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
KFB/KFN-TAM-BA_IA-e-1832 11
• Display Unit
6 Unpacking and placing
6.1 Installation Site, Location of Use
The display units are designed in a way that reliable weighing results are achieved in
common conditions of use.
Precise and fast work is achieved by selecting the right place for your display unit
and your weighing plate.
On the installation site observe the following:
• Place the display unit and the weighing plate on a stable, even sur fac e.
• Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
• Protect the display unit and the weighing plate against direct draft from open
windows or doors.
• Avoid jarring during weighing;
• Protect the display unit and the weighing plate against high humidity, vapours
and dust.
• Do not expose the display unit to extreme dampness for longer periods of
time. Non-permitted condensation (condensation of air humidity on the
appliance) may occur if a cold appliance is taken to a considerably warmer
environment. In this case, acclimatize the disconnected appliance for ca. 2
hours at room temperature.
• Avoid static charge of goods to be weighed or weighing container.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference.
6.2 Unpacking and placing
Take the display unit carefully out of its packaging, remove the plastic jacket and
install it at the designated work space.
Mount the display unit in a way that facilitates operation and where it is easy to see.
6.3 Scope of delivery / serial accessories:
• Mains adapter
• Support base incl. wall bracket
• Operating instructions
12 KFB/KFN-TAM-BA_IA-e-1832
Transport Securing
6.4 Transportation lock (illustration example)
Please note: if the display unit is used together with platform with transportation lock,
this transportation lock must be released prior to use:
6.5 Error message
As soon as an error message appears in the balance display, the
balance must not more be used, e.g. Err 4
KFB/KFN-TAM-BA_IA-e-1832 13
6.6 Mains connection
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.
6.7 Storage battery operation (optional)
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 12 hours.
If the weight display shows , this is an indication that the capacity of the
rechargeable battery is almost exhausted. The unit will be ready for operation for
approx. another 10 hours before switching off automatically. Charge the battery with
the help of the supplied power pack.
The LED display informs you during loading about the loading status of the
rechargeable battery.
red: Voltage has dropped below prescribed minimum.
green: Battery is completely discharged
yellow: Charging storage battery
To conserve energy, enable the automatic switch-off function „AUTO OFF“, see
chap. 7.14.
14 KFB/KFN-TAM-BA_IA-e-1832
warm-up time.
6.8 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each display unit with connected weighing plate must be coordinated - in compliance
with the underlying physical weighing principle - to the existing acceleration due to
gravity at its place of location (only if the weighing system has not already been
adjusted to the location in the factory). This adjustment process must be carried out
for the first commissioning, after each change of location as well as in case of
fluctuating environment temperature. To receive accurate measuring values it is also
recommended to adjust the display unit periodically in weighing operation.
• In weighing systems with a resolution of < 15 000 dividing steps an
adjustment is recommended.
In weighing systems with a resolution of > 15 000 dividing steps a
linearisation is recommended (see chap. 6.10).
• Prepare the required adjustment weight. The weight to be used depends
on the capacity of the scale. Carry out adjustment as near as possible to
the scale’s maximum weight. Info about test weights can be found on
the Internet at: http://www.kern-sohn.com.
• Observe stable environmental conditions. Stabilisation requires a certain
6.8.1 Verified weighing systems
In verified weighing systems the menu item for adjustment „P2 mode“ is
blocked.
KERN KFB-TAM
To disable the access lock, destroy the seal and actuate the adjustment
switch. Position of the adjustment switch see chap. 6.11
KERN KFN-TAM
To override the blocked access you will have to destroy the seal before calling
up the menu and to short-circuit the two contacts on the circuit board [K2],
using a jumper (See chap. 6.11).
Attention:
After destruction of the seal the weighing system must be re-ver ified by an
authorised agency and a new verification wire/seal mark fitt ed before it can be
reused for applications subject to verification.
KFB/KFN-TAM-BA_IA-e-1832 15
Call up menu:
1. Switch-on balance and during the selftest press .
2. Press , , subsequently, the first menu block
„PO CHK“ will be displayed.
3. Press repeatedly until „P2 mode“ will be displayed.
For the KFB-TAM model operate the adjustment switch.
4. Press and select the set weighing scales type by .
= Single-range balance
= Dual range balance
= Multi-interval balance
5. Acknowledge with .
6. Press repeatedly until „CAL“ will be displayed.
7. Confirm with and select setting „noLin“ by .
16 KFB/KFN-TAM-BA_IA-e-1832
Carefully place adjusting weight in the centre of the weighing
How to carry out an adjustment:
Confirm menu setting „noLin“ by .
Ensure that there are no objects on the weighing plate.
Wait for stability display, then press .
The currently set adjustment weight will be displayed.
To change by using the navigation buttons (see chap. 2.1.1)
select the desired setting, the active digit is flashing.
Acknowledge with .
plate. Wait for stability display, then press .
After the adjustment the balance will carry out a self-test.
Remove adjusting weight during selftest, balance will return
into weighing mode automatically.
An adjusting error or incorrect adjusting weight will be
indicated by the error message; repeat adjustment
procedure.
KFB/KFN-TAM-BA_IA-e-1832 17
Call up menu:
6.8.2 Non verifiable weighing systems
1. Switch-on balance and during the selftest press .
2. Press subsequently , , the first menu block
„PO CHK“ will be displayed.
3. Press repeatedly until „P3 CAL“ will be displayed.
4. Confirm with ; press repeatedly until „CAL“
appears.
5. Acknowledge using , the current setting is displayed.
Press to confirm; press to select setting.
noLin = adjustment
LineAr = linearization, see chap. 6.10
How to carry out adjustment:
Confirm menu setting „noLin“ by .
Ensure that there are no objects on the weighing plate.
Wait for stability display, then press .
The currently set adjustment weight will be displayed.
To change by using the navigation buttons (see chap. 2.1.1)
select the desired setting, the active digit is flashing.
Acknowledge with .
Carefully place adjusting weight in the centre of the weighing
plate. Wait for stability display, then press .
After the adjustment the balance will carry out a self-test.
Remove adjusting weight during selftest, balance will return
into weighing mode automatically. An adjusting error or
incorrect adjusting weight will be indicated by the error
message; repeat adjustment procedure.
18 KFB/KFN-TAM-BA_IA-e-1832
• In balances with a resolution of > 15 000 dividing steps carrying out a
the adjustment switch s ee chap. 6.11
6.9 Linearization
Linearity shows the greatest deviation of a weight display on the scale to the value of
the respective test weight according to plus and minus over the entire weighing
range. If linearity deviation is discovered during a testing instrument control, you can
improve this by means of linearization.
6.9.1 Verified weighing systems:
linearisation is recommended.
• Carrying out linearization is restricted to specialist staff possessing
well acquainted with the workings of weighing scales.
• The test weights to be used must be adapted to the weighing scale’s
specifications; see chapter “testing instruments control”.
• Observe stable environmental conditions. Stabilisation requires a
certain warm-up time.
• After successful linearisation you will have to carry out calibration;
see chapter “testing instruments control”.
• The adjustment is locked for verified balances. To disable the access
lock, destroy the seal and actuate the adjustment switch. Position o f
Menu item P2 modeCalCall up liner, see chap. 6.9.1
Confirm by , the password query „Pn“ will be displayed.
Press subsequently , , or , , .
Ensure that there are no objects on the weighing pan.
Wait for stability display, then press .
When “Ld 1“ is displayed, put the first adjustment weight (1/3
max) carefully in the centre of the weighing platform. Wait for
stability display, then press .
When “Ld 2“ is displayed, put the second adjustment weight
(2/3 max) carefully in the centre of the weighing platform.
Wait for stability display, then press .
When “Ld 3“ is displayed, put the third adjustment weight
(max) carefully in the centre of the weighing platform. Wait
for stability display, then press .
KFB/KFN-TAM-BA_IA-e-1832 19
After linearisation the balance will carry out a self-test.
Remove adjusting weight during selftest, balance will return
into weighing mode automatically.
6.9.2 Non-verified weighing systems
Call-up menu item P3 CALCalLiner , see c hap. 6.9.1
Confirm by , the password query „Pn“ will be displayed.
Press , , or , , subsequently.
Ensure that there are no objects on the weighing pan.
Wait for stability display, then press .
When “Ld 1“ is displayed, put the first adjustment weight (1/3
max) carefully in the centre of the weighing platform. Wait for
stability display, then press .
When “Ld 2“ is displayed, put the second adjustment weight
(2/3 max) carefully in the centre of the weighing platform.
Wait for stability display, then press .
When “Ld 3“ is displayed, put the third adjustment weight
(max) carefully in the centre of the weighing platform. Wait
for stability display, then press .
After a successful linearisation the balance will carry out a
self-test. Remove adjusting weight during selftest, bal a nc e
will return into weighing mode automatically.
20 KFB/KFN-TAM-BA_IA-e-1832
6.10 Verification
General introduction:
According to EU directive 2014/31EU balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purpose.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
Verification notes:
An EU Qualification Approval is in existence for verified weighing systems. If a
balance is used where obligation to verify exists as described above, it must be
verified and re-verified at regular intervals.
Reverification is carried out according to the relevant national statutory regulations.
The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
• Verification of the weighing system is invalid without the "seal".
KFB/KFN-TAM-BA_IA-e-1832 21
[K1]
Notes on verified weighing systems
KFB-TAM:
Access to conductor plate:
• Remove seal
• Open display unit
• The application of the display unit as a weighing system able to be verified
requires that the contacts of the circuit board are short-circuited with the help
of a jumper [K1].
For non verifiable weighing systems remove the jumper.
In verified weighing systems the menu item for adjustment, „P2 mode“ will be
blocked.
To disable the access lock, destroy the seal and actuate the adjustment switch.
Position of seals and adjusting switch
1. Self-destroying seal mark
2. Adjustment switch
3. Cover of adjustment switch
4. Self-destroying seal mark
22 KFB/KFN-TAM-BA_IA-e-1832
[K1]
[K2]
KFN-TAM:
Access to conductor plate:
• Remove seal
• Open display unit
• The application of the display unit as a weighing system able to be verified
requires that the contacts of the circuit board are short-circuited with the help
of a jumper [K1]. For non verifiable weighing systems remove the jumper.
• To adjust, short-circuit the contacts of the circuit board, using a jumper [K2].
KFB/KFN-TAM-BA_IA-e-1832 23
Overloading exceeding the stated maximum load (max) of the device, minus a
7 Operation
7.1 Start-up
Press and the instrument will carry out a self-test. As soon as the weight
display appears, the instrument will be ready to weigh.
7.2 Switching Off
Press and the display will disappear.
7.3 Zeroing
Resetting to zero corrects the influence of light soiling on the weighing plate. The unit
is equipped with an automatic zero setting function. Therefore the unit can be reset to
zero at any time as follows:
To unload the weighing system
Press and zero display as well as indicator ZERO will appear.
7.4 Simple weighing
Place goods to be weighed on balance.
Wait until stability display STABLE appears.
Read weighing result.
Overload warning
possibly existing tare load, must be strictly avoided. This could damage the
instrument.
Exceeding maximum load is indicated by the display of „----“ and an audio
sound. Unload weighing system or reduce preload.
24 KFB/KFN-TAM-BA_IA-e-1832
7.5 Switch-over we i ghing unit (only not verifiable weighing systems)
How to enable weighing units:
Call-up menu item P5 Unt, see chap. 8.1
Press and the first weighing unit with the current setting
will be displayed.
To enable [on] / disable [off] the displayed weighing unit,
press
Acknowledge with . The next unit with the current setting
will be displayed.
To enable [off] / disable [on] the displayed weighing unit,
press .
Acknowledge with .
Repeat sequence for each weighing unit.
Note:
„tj“ and „Hj“ cannot be activated at the same time, onl y either
... or ... .
Return to weighing mode using
Switch-over weighing unit:
Keep pressed, the display changes over to the
weighing units activated before (e.g. kg lb)
KFB/KFN-TAM-BA_IA-e-1832 25
7.6 Weighing with tare
Deposit weighing vessel. After successful standstill control press the button.
Zero display and indicator NET appear.
The weight of the container is now internally saved.
Weigh the material, the net weight will be indicated.
The weight of the weighing container will be displayed as a minus number after
removing the weighing container.
The tare procedure can be repeated as many times as necessary, for example
with initial weighing of several components for a mix (add-on weighing). The limit
is reached when the taring range capacity (see type plate)is full.
To change between gross weight and net weight, press .
To delete the tare value, remove load from weighing plate and press .
26 KFB/KFN-TAM-BA_IA-e-1832
An acoustic signal sounds when load is beyond tolerance
7.7 Weighing with tolerance range
You can set an upper or lower limit when weighing with tolerance range and thus
ensure that the weighed load remains exactly within the set limits.
During tolerance tests such as dosing, portioning and sorting the unit will indicate
exceeded or undershot limits by emitting an optical or acoustic signal.
Audio signal:
The acoustic signal depends on the settings in menu block „BEEP“.
Options:
• no
• ok
• ng
Optical signal:
Three colour signal lights indicate whether the load is within the two tolerance limits.
The signal lights provide the following information:
Acoustic signal turned off
An acoustic signal sounds when load is within tolerance
limits
limits
+
Goods to be weighed above tolerance limit
Goods to be weighed within tolerance range
Goods to be weighed below tolerance limit
-
Red signal light
glowing
Green signal light
glowing
Red signal light
glowing
The settings for tolerance weighing may be called up either via menu block „P0 CHK“
(see chap. 8) or faster via the key combination
KFB/KFN-TAM-BA_IA-e-1832 27
and the current setting for the acoustic signal will
7.7.1 Tolerance check for target weight
Settings
Press and at the same time in weighing mode.
Press until the display for entering the lower limit value
appears.
Press , the current setting will be displayed.
To enter the lower limit, e. g. 1000 Kg, press the navigation
keys (See chap. 2.1.1); the currently enabled digit will be
flashing.
Confirm input by .
Press repeatedly until is displayed.
Press , the current setting for the upper limit will be
displayed.
Press the navigation keys (See chap. 2.1.1) to enter the
upper limit, e.g. 1,100 kg; the currently enabled digit will be
flashing.
Confirm input by .
Press repeatedly until is displayed.
Press
be shown.
Select desired setting (no, ok, ng) by .
Confirm input by .
28 KFB/KFN-TAM-BA_IA-e-1832
Press ; weighing system is in tolerance weighing mode.
From here evaluation takes place whether the goods to be
weighed are within the two tolerance limits.
Weighing with tolerance range
Tare when using a weighing container.
Put on goods to be weighed, tolerance control is started. The signal lights
indicate whether the load is within the two set limits.
Load below specified
tolerance
Red signal light
next to „-“ ON illuminated
• The tolerance control is not active when the weight is under 20d.
• To delete limits, enter “00.000 kg“.
Load within specified
tolerance
Green signal light
next to „„ illuminated
Load exceeds specified
tolerance
Red signal light
next to „+“ ON illuminated
KFB/KFN-TAM-BA_IA-e-1832 29
Press and the current setting for the acoustic signal will
7.7.2 Tolerance check for target quantity
Settings
Press and at the same time in weighing mode.
Press until the display for entering the lower limit value
appears.
Press , the current setting will be displayed.
To enter the lower limit, e. g. 75 items, press the navigation
buttons (see chap. 2.1.1); the currently enabled digit will be
flashing.
Confirm input by .
Press repeatedly until is displayed.
Press , the current setting for the upper limit will be
displayed.
To enter the upper limit, e. g. 100 items, press the navigation
buttons (see chap. 2.1.1); the currently enabled digit will be
flashing.
Confirm input by .
Press repeatedly until is displayed.
be shown.
Select desired setting (no, ok, ng) by .
Confirm input by .
30 KFB/KFN-TAM-BA_IA-e-1832
Press ; weighing system is in tolerance weighing mode.
From here evaluation takes place whether the goods to be
weighed are within the two tolerance limits.
Weighing with tolerance range
Set item weight, see chap. 7.10.
Tare when using a weighing container.
Put on goods to be weighed, tolerance control is started. The signal lights
indicate whether the load is within the two set limits.
Load below specified
tolerance
Red signal light
next to „-“ ON illuminated
• The tolerance control is not active when the weight is under 20d.
• To delete limits, enter „00000 PCS“.
Load within specified
tolerance
Green signal light
next to „„ illuminated
Load exceeds specified
tolerance
Red signal light
next to „+“ ON illuminated
KFB/KFN-TAM-BA_IA-e-1832 31
• Menu setting:
• The totalizing function is not active when the weight is under 20d.
7.8 Manual totalizing
With this function the individual weighing values are added into the summation
memory by pressing and edited, when an optional printer is connected.
„P1 COM“ or „P2 COM“ „MODE“ „PR2““, see chap. 8
Add up:
Place weighing goods A.
Wait until the stability display STABLE appears, then press . The weight value
will be saved and printed if an optional printer is connected.
Remove the weighed good. More weighed goods can only be added when the
display ≤ zero.
Place goods to be weighed B.
Wait until the stability display appears, then press . Weighing value will be
added to summation memory and possibly printed.
The number of weighing actions, followed by the total weight will be displayed for
2 sec.
Add more weighed goods as described before.
Please note that the weighing system must be unloaded between the individual
weighing procedures.
This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.
Display and output sum „Total“:
Press , number of weighing, followed by the total weight will be displayed for
2 sec. Press to print out this display.
32 KFB/KFN-TAM-BA_IA-e-1832
Printout example KERN YKB-01N:
Delete weighing data:
Press and at the same time The data in the summation memory are
deleted.
Menu setting „P1 COM“ or „P2 COM“ „Lab 2“ / Prt 7“
First weighing
Second weighing
Third weighing
A
Number of
+
weighings / total e
Additonal printout example see chap. 10.2
KFB/KFN-TAM-BA_IA-e-1832 33
• Menu settings:
7.8.
7.9 Automatic adding-up
With this function the individual weighing values are automatically added into the
summation memory when the bala nce is unloaded without pressi n g and edited,
when an optional printer is connected.
„P1 COM“ or „P2 COM „MODE“ „AUTO““, see chap. 8
Der Indikator AUTO wird angezeigt.
Add up:
Place weighing goods A.
After the standstill control sounds a signal tone. The weighing value will be added
to the summation memory and printed.
Remove the weighed good. More weighed goods can only be added when the
display ≤ zero.
Place goods to be weighed B.
After the standstill control sounds a signal tone. The weighing value will be added
to the summation memory and printed. Number of weighing, followed by the total
weight will be displayed for 2 sec.
Add more weighed goods as described before.
Please note that the weighing system must be unloaded between the individual
weighing procedures.
This process may be repeated 99 times or till such time as the capacity of the
weighing system has been exhausted.
Display and delete the weighing data, as well as printout examples see chap.
34 KFB/KFN-TAM-BA_IA-e-1832
7.10 Parts c ounti ng
Before the balance can count parts, it must know the average part weight (i.e.
reference). Proceed by putting on a certain number of the parts to be counted. The
balance determines the total weight and divides it by the number of parts, the socalled reference quantity. Counting is then carried out on the basis of the calculated
average piece weight.
As a rule:
The higher the reference quantity the higher the counting exactness.
In weighing mode , press and hold until the message „P
10“ appears that is used to set the reference quantity.
Use to set the desired reference quantity (such as 100),
options include P 10, P 20, P 50, P100, P 200.
Place as many items to be counted (such as 100 items) as
demanded by the set reference quantity and confirm by
The weighing scales calculate the reference weight. The
current quantity (such as 100 items) will be displayed.
Remove reference weight. The balance is from now in parts
counting mode counting all units on the weighing plate.
Back to Weighing mode by .
KFB/KFN-TAM-BA_IA-e-1832 35
7.11 Animal weighing
The animal weighing function is suitable for weighing restless loads.
The weighing system will display a mean value derived from several weighing results.
The animal weighing program can be enabled by either calling up menu block
„P3 OTH“ or „P4 OTH“ „ANM“ „ON“ (See chap. 8) or faster via key combination.
The indicator shows HOLD as long as the animal weighing function remains enabled.
Place the load on the weighing system and wait until the scale is steady.
Press and at the same time; you will hear an acoustic signal, indicating
that the animal weighing function is enabled.
Whilst averaging is taking place you can add or remove loads as the measuring
value will be constantly updated.
To deactivate the animal weighing function press and at the same time.
36 KFB/KFN-TAM-BA_IA-e-1832
7.12 Lock keyboard
To enable/disable the keyboard lock go to menu item „P3 OTH“ or „P4 OTH“
„LOCK“, see chap.8.
Whilst the function is enabled the keyboard will self-lock after no key has been
pressed for 10 minutes. „K-LCK“ will be displayed as soon as a key is pressed.
To disable the lock, press , and hold plus (2 s) until „U LCK“ appears.
7.13 Display background illumination
Keep pressed (3s) until „setbl“ appears.
Press again, the current setting will be displayed.
Use to select the desired setting.
bl on Continu ous bac kg r oun d li g hti ng
bl off Background illumination off
bl Auto Automatic background illumination on when weighing pate is
loaded or key pressed.
Either save by or cancel by pressing .
Back to weighing mode by .
KFB/KFN-TAM-BA_IA-e-1832 37
7.14 Automatic switch-off function „AUTO OFF“
The unit is automatically switched off within the preset time when the display unit or
the weighing bridge are not operated.
Keep pressed (3s) until „setbl“ appears.
Press to call up AUTO OFF-function
Press , the current setting will be displayed.
Use to select the desired setting.
of 0 AUTO OFF - function disabled
of 3 Weighing system wi l l be turned off a fter 3 min .
of 5 Weighing system will be turned off after 5 min.
of 15 Weighing system will be turned off after 15 mi n.
of 30 Weighing system will be turned off after 30 mi n.
Either save by or cancel by pressing .
Back to weighing mode by .
38 KFB/KFN-TAM-BA_IA-e-1832
current setting will be displayed.
8 Menu
The application of the display unit as a verified weighing system requires that you
short-circuit the two contacts [K1] of the circuit board, using a jumper. To that effect,
a menu for verified weighing systems is available. For menu layout see chap. 8.2.
There is no jumper for weighing systems that cannot be verified. To that effect, a
menu is available for weighing systems that cannot be verified, Menu layout
see chap. 8.1
Navigation in the menu:
Call up menu
Switch-on balance and during the selftest press .
Press , , subsequently, the first menu
block „PO CHK“ will be displayed.
Select menu block
Select setting
Change settings
Acknowledge setting /
exit the menu
Return to weighing
mode
With help of , the individual menu items can be
selected one after the other.
Confirm selected menu item by pressing . The
To change to the available settings, press the
navigations keys as described in chap. 2.1.
Either save by pressing or cancel by pressing .
Press repeatedly to exit menu.
KFB/KFN-TAM-BA_IA-e-1832 39
Menu block
Main menu
Menu item
Submenu
Acoustic signal for weighing with tolerance range
switched off
P1 REF
P2 COM
MODE
S0 off
Continuous data output,
selectable “send zero” yes / no
S0 on
ST1
One output for stable weighing value
STC
Continuous data output of stable weighing
values
PR1
Output after pressing
PR2
Manual totalizing, see chap. 7.8.
added to the summation memory and issued.
8.1 Overview non verifiable weighing systems (contacts of circuit board [K1] not short-circuited)
Available settings / explanation
PO CHK
Weighing with
tolerance range,
see chap. 7.7
Zero point
settings
nEt H Upper limit value „Tolerance check weighing“, input see
chap. 7.7.1
nEt LO Lower limit value „Tolerance check weighing“, input see
chap. 7.7.1
PCS H Upper limit value „Tolerance check counting“, input see
chap. 7.7.2
PCS L Lower limit value „Tolerance check counting“, input see
chap. 7.7.2
BEEP no
ok Audio sound when load is within tolerance limits
nG Audio sound when load is beyond tolerance limits
A2n0 Automatic zero point correction (Autozero) by changing the
display, digits selectable (0.5d, 1d, 2d, 4d)
0AUto Zero setting range
Load range where the display after switching-on the
balance is set to zero.
Selectable 0, 2, 5, 10, 20, 30, 50, 100 %
0rAGE Zero setting range
Load range where the display is set to zero by pressing
. Selectable 0, 2, 4, 10 , 20* , 50, 100%.
0tArE Aut om atic taring „on / off“, taring range adjustable in menu
item „0Auto“.
SPEEd Not documented
Zero Zero point setting
CONT
Interface
parameter
Press and the weighing value will be
40 KFB/KFN-TAM-BA_IA-e-1832
AUTO*
For automatic add-up see chap. 7.9.
memory on unloading of weighing scale.
wirel
Not documented
BAUD
Available Baudrate: 600, 1200, 2400, 4800, 9600*
Pr
7E1
7 bits, even parity
7o1
7 bits, odd parity
8n1*
8 bits, no parity
PTYPE
tPUP*
Standard printer setti n g
LP50
Not documented
Lab
Lab x
For data output format, see chap.8.2, tab. 1
(Factory settings LAb 2 / Prt 7)
Prt
Prt x
LAnG
eng*
Standard settings English
chn
P3 CAL
COUNT
Display internal resolution
DECI
Position of the decimal dot
DUAL
Setting balance type, capacity (Max) and readability (d)
off
Single-range balance
R1 inc
Readability
R1 cap
Capacity
on
Dual range balance
R1 inc
Readability 1st weighing range
R1 cap
Capacity 1st weighing range
R2 inc
Readability 2nd weighing range
R2 cap
Capacity 2nd weighing range
CAL
noLin
For adjustment, see chap. 6.9.2
Liner
For linearization, see chap. 6.10.2
GrA
Not documented
on
Keyboard lock enabled, see chap. 7.11
off*
Keyboard lock disable d
on
Animal weighing enabled, see chap. 7.10
off*
Animal weighing disabled
This function is used to issue and add individual
weighing values automatically to the summation
Configuration
data
see chap. 12.4
ASK
For remote control commands, see chap. 10.4
P4 OTH
LOCK
ANM
KFB/KFN-TAM-BA_IA-e-1832 41
kg
on* off
g on off*
lb
on off*
oz
on off*
tJ
on off
HJ
on off
USB connector
P5 Unt
Switch-over
weighing unit,
see chap. 7.5
P6 xcl Not documented
P7 rst
Use to reset balance settings to factory default.
P8 Usb
USB connector
on
(to send data via RS232 select the setting "USB off")
off
P9 Ckm CK nt
Not documented CK P5
CK of
Factory settings are marked by *.
42 KFB/KFN-TAM-BA_IA-e-1832
Menu block
Main menu
Menu item
Submenu
Acoustic signal for weighing with tolerance
range switched off
Audio sound when load is within tolerance
limits
Audio sound when load is beyond tolerance
limits
P1 COM
MODE
CONT
S0 off
Continuous data output,
selectable “send zero” yes / no
S0 on
ST1
One output for stable weighing value
Continuous data output of stable weighing
values
PR1
Output after pressing
PR2
Manual totalizing, see chap. 7.8
added to the summation memory and issued.
AUTO
8.2 Overview verified weighing systems (contacts of circuit board [K1] short-circuited by means of jumper)
In verified weighing systems the access to „P2 mode and „P4 tAr“ is locked.
KERN KFB-TAM:
To disable the access lock, destroy the seal and actuate the adjustment switch.
Position of the adjustment switch see chap. 6.11.
KERN KFN-TAM:
In order to unlock the access, the seal must be destroyed and both contacts of the
printed circuit board [K2] must be shor t -circuited by a jumper, see chap. 6.11.
Attention:
After destruction of the seal the weighing system must be re-ver ified by an
authorised agency and a new v erificat ion wire/seal mark fitted bef or e it can be
reused for applications subject to verification.
PO CHK
Weighing with
tolerance range,
see chap. 7.7
Interface
parameter
Available settings / explanation
nEt H Upper limit value „Tolerance check weighing“, input see
chap. 7.7.1
nEt LO Lower limit value „Tolerance check weighing“, input see
chap. 7.7.1
PCS H Upper limit value „Tolerance check counting“, input see
chap. 7.7.2
PCS L Lower limit value „Tolerance check counting“, input see
chap. 7.7.2
BEEP
no
ok
ng
STC
KFB/KFN-TAM-BA_IA-e-1832 43
Press and the weighing value will be
For automatic totalizing see chap. 7.9
This function is used to issue and add
individual weighing values automatically to the
summation memory on unloading of weighing
scale.
ASK
For remote control commands, see chap. 10.4
wireless
Not documented
baud
Available Baudrate: 600, 1200, 2400, 4800, 9600
Pr
7E1
7 bits, even parity
7o1
7 bits, odd parity
8n1
8 bits, no parity
PtYPE
tPUP
Standard printer setting
LP50
Not documented
Lab
Lab x
Details see following table 1
(Factory settings LAb 2 / Prt 7)
Prt
Prt x
Lang
Eng*
Chn
P2 mode
SiGr
Single-range balance
COUNT
Display internal resolution
DECI
Position of the decimal dot
Div.
Readability [d] / verification value[s]
CAP
Balance capacity [Max]
noLin
Adjustment, see chap. 6.9
LinEr
Linearisation, see chap. 6.10
GrA
Not documented
dUAL 1
Dual range balance
scales will remain in 2nd range.
COUNT
Display internal resolution
DECI
Position of the decimal dot
Readability [d] / verification value [e]
1. weighing range
Readability [d] / verification value [e]
2. weighing range
Weighing scale capacity [max]
1. Weighing range
Weighing scale capacity [max]
2. Weighing range
noLin
Adjustment, see chap. 6.9
LinEr
For linearization, see chap. 6.10
GrA
Not documented
Konfigurationsdaten
Standard setting English
CAL
Balance with two weighing ranges and different maximum load
and weighing ranges and interval sizes but only one loadsupporting pan, whereb y each range extends from zero to the
respective maximum capacity.
div 1
div.
div 2
CAP 1
CAP
CAP 2
CAL
When load is removed, weighing
44 KFB/KFN-TAM-BA_IA-e-1832
dUAL 2
Multi-interval balance
changed during loading and unloading.
COUNT
Display internal resolution
DECI
Position of the decimal dot
Readability [d] / verification value [e]
1. weighing range
Readability [d] / verification value [e]
2. weighing range
Weighing scale capacity [max]
1. Weighing range
Weighing scale capacity [max]
2. Weighing range
noLin
Adjustment, see chap. 0
LinEr
Linearisation, see chap. 6.10
GrA
Not documented
P3 OTH
on
Keyboard lock enabled
off
Keyboard lock disabled
on
Animal weighing enabled
off
Animal weighing disabled
P4 tAr
Confirm input by .
P5 St
St on
Follow up tare switched on
St off
Follow up tare switched off
P6 SP
7.5, 15, 30
Not documented
Weighing scales with one weighi ng range su bd iv id ed into partial
weighing ranges, each providing a different scale interval.
scale interval depends on the applied load and is automatically
div 1
div.
div 2
CAP 1
CAP
CAP 2
CAL
The
s. Kap. 7.10 / 7.11
LOCK
ANM
Restricted taring
range
Follow up tare
Press , the current setting will be displayed. Using the
navigation buttons (see chap. 2.1.1) select the desired setting, the
active digit is flashing.
KFB/KFN-TAM-BA_IA-e-1832 45
Lab
Tab. 1.: Printout examples
• Menu setting P1 Com / P2 Com Mode PR2
• Data output
Prt
0~3
*******************
GS: 5.000kg
*******************
4~7
*******************
No.: 1
GS: 5.000kg
*******************
0 1 2 3
G Gross weight
*******************
NT: 5.000kg
TW: 5.000kg
GW: 10.000kg
*******************
*******************
No.: 1
NT: 5.000kg
TW: 5.000kg
GW: 10.000kg
*******************
**********************
GS: 5.000kg
TOTAL: 10.000kg
**********************
**********************
No.: 1
GS: 5.000kg
TOTAL: 10.000kg
**********************
**********************
NT: 5.000kg
TW: 5.000kg
GW: 10.000kg
TOTAL: 10.000kg
**********************
**********************
No.: 1
NT: 5.000kg
TW: 5.000kg
GW: 10.000kg
TOTAL: 10.000kg
**********************
N Net weight
T Tare weight
NO Number weighing processes
C Total of all individual weighings
46 KFB/KFN-TAM-BA_IA-e-1832
Value outside the A/D changer
9 Service, maintenance, disposal
9.1 Clean
• Before cleaning, disconnect the appliance from the operating voltage.
• Do not use aggressive detergents (solvents or similar).
9.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
9.3 Disposal
Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location wher e the appl i a nc e is u sed.
9.4 Error messages
Error
message
Description Possible causes
- - - - -
Maximum load exceeded
- - ol - -
Err 1
Err 2
Err 4 Zeroing range exceeded due
Err 5 Keyboard error
Err 6
Incorrect data input
Incorrect time entry
to switching-on balance or
pressing (normally 4%
max)
range
• Unload weighing system or reduce
preload.
• Follow format “yy:mm:dd“
• Follow format “hh:mm:ss“
• Object on the weighing plate
• Overload when zeroing
• Weighing plate not installed
• Damaged weighing cell
Err 9 Stability display does not
appear
KFB/KFN-TAM-BA_IA-e-1832 47
• Damaged electronics
• Check the environmental
conditions.
Err 10 Communication error
Err 15 Gravitation error
Err 17 Taring range exceeded
Err 19 Zero point displaced
Fai l h /
Fai l l
Err P
Ba lo /
Lo ba
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
Adjustment error
Printer error
Battery very low
• No data
• Range 0.9 ~ 1.0
• Reduce load
• Remedy:
Adjust / linearize
• Repeat adjustment.
• Check communication paramet er s
• Recharge battery
48 KFB/KFN-TAM-BA_IA-e-1832
10 Da t a out put RS 2 32C
You can print weighing data automatically via the RS 232C interface or manually by
pressing via the interface according to the setting in the menu.
This data exchange is asynchronous using ASCII - Code.
The following conditions must be met to provide successful communication between
the weighing system and the printer.
• Use a suitable cable to connect the display unit to the interface of the printer.
Faultless operation requires an adequate KERN interface cable.
• Communication parameters (baud rate, bits and parity) of display unit and
printer must match. For a detailed description of interface parameters see
chap. 8, menu block „P1 COM“ or ‚“P2 COM“
10.1 Technic al da ta
Connection 9 pin d-subminiature bushing
KFB-TAM KFN-TAM
Pin 2 RXD
Pin 3 TXD
Pin 5 GND
Pin 2 TXD
Pin 3 RXD
Pin 5 GND
Baud rate Optional 600/1200/2400/4800/9600
Parity 8 bits, no parity / 7 bits, even parity / 7 bits, odd parity
KFB/KFN-TAM-BA_IA-e-1832 49
****************************
10.2 Printer mode / Printout examples (KERN YKB-01N)
Menu setting P8 USB off
• Weighing
1. Continuous output
(Menu setting P1 Com Mode Com S0 on
bzw. P2 Com Mode Com S0 on)
Menu setting P1 Com bzw. P2 Com LAb 0 / Prt 0:
****************************
ST, G , 53,2 kg
****************************
****************************
US, G , 53,2 kg
****************************
2. Data output
(Menu settings: P1 Com Mode Pr1 bzw. P2 Com Mode Pr1)
Menu setting P1 Com bzw. P2 Com LAb 0 / Prt 0:
****************************
G : 53,2 kg
****************************
****************************
N : 52,6 kg
****************************
Menu setting P1 Com bzw. P2 Com LAb 3 / Prt 7:
****************************
N : 53,2 kg
T : 0,0 kg
G : 53,2 kg
****************************
• Counting
PCS 100
****************************
50 KFB/KFN-TAM-BA_IA-e-1832
****************************
N : 52,6 kg
T : 10,0 kg
G : 62,6 kg
****************************
Stable value
Instable value
Gross weight
Net weight
Tare weight
Number weighing processes
Total of all individual weighings
Space line
• Totalizing
3. Data output
(Menu setting P1 Com Mode PR2 bzw. P2 Com Mode Pr2)
P1 Com bzw. P2 Com LAb 3/Prt 7: P1 Com bzw. P2 Com LAb 0/Prt 0:
Symbols:
ST
US
G
N
T
NO
C
<lf>
KFB/KFN-TAM-BA_IA-e-1832 51
ST,G , 1.000KG
10.3 Output log (continuous output)
• Weighing
HEADER1 : ST=STABLE， US=UNSTABLE
HEADER2: NT=NET， GS=GROSS
10.4 Remote control instructions
Command Function Printout examples
S Stable weighing value for the weight is
sent via the RS232 interface
W
T No data are sent, the balance carries out
Z No data are sent, the zero-display
P Quantity will be sent via the RS232-
Weighing value for the w eight (stabl e or
unstable) is sent via the RS232 interface
the tare function.
appears.
interface
ST,G , 1.000KG
US,G , 1.342KG
-
-
10PCS
52 KFB/KFN-TAM-BA_IA-e-1832
KFB-TAM
KFN-TAM
Pin 2
RXD
TXD
Pin 3
TXD
RXD
Pin 4
VCC 5V
VCC 5V
Pin 5
GND
GND
Pin 1
VB
Pin 5
GND
Pin 6
OK
Pin 7
LOW
Pin 8
HI
Pin 9
BEEP
10.5 I/O-Function
Models KFB-TAM / KFN-TAM:
RS232
Model KFN-TAM:
Shift point
KFB/KFN-TAM-BA_IA-e-1832 53
The displayed weight does
not glow.
• Mains power supply interrupted (mains cable
defective).
• Power supply interrupted.
• (Rechargeable) batteries are inserted incorrectly or
empty
• No (rechargeable) batteries inserted.
The displayed weight is
• Table/floor vibrations
• Weighing pan has contact with other objects.
possible)
The weighing result is
obviously incorrect
• Adjustment is no longer correct.
• Great fluctuations in temperature.
possible)
11 Instant help
In case of an error in the program process, briefly turn off the display unit and
disconnect from power supply. The weighing process must then be restarted from the
beginning.
Help:
Fault Possible cause
• The display unit is not switched on.
permanently changing
Should other error messages occur, switch display unit off and then on again. If the
error message remains inform manufacturer.
• Draught/air movement
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
• The display of the balance is not at zero
• Warm-up time was ignored.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
54 KFB/KFN-TAM-BA_IA-e-1832
12 Installing display unit / weighing bridge
Installation / configuration of a weighing system must be carried out by a
well acquainted specialist with the workings of weighing balances.
12.1 Technic al da ta
Supply voltage: 5 V/150mA
Max. signal voltage 0-10 mV
Zeroing range 0-2 mV
Sensitivity 2-3 mV/V
Resistance parameter 80 - 100 Ω, max 4 items per 350 Ω load cell
12.2 Weighing system design
The display unit is suitable for connection to any analogue platform in compliance
with the required specifications.
The following data must be established before selecting a weighing cell:
• Weighing balance capacity
This usually corresponds to the heaviest load to be weighed.
• Preload
This corresponds to the total weight of all parts that are to be placed on the
weighing cell such as upper part o f platform, weighing pan etc.
• Total zero setting range
This is composed of the start-up zero setting range (± 2%) and the zero
setting range available to the user via the ZERO-key (2%). The total zero
setting range equals therefore 4 % of the scale’s capacity.
The addit ion of weighing scales capacity, preload and the total zero setting
range give the required capacity for the weighing cell.
To avoid overloading of the weighing cell, include an additional safety
margin.
• Smallest desired display division
• Verifiability, if required
The application of the display unit as a verified weighing system requires
that you short-circuit the two contacts [K1] of the circuit board, using a
jumper; for position see cha p. 6.11.
Remove the jumper for weighing systems not able to be verified.
KFB/KFN-TAM-BA_IA-e-1832 55
PIN
Loadcell
6- conductor
4- conductor
7
EXC+
6
SEN+
5
EXC-
4
SEN-
3
SHIELD
SHIELD
2
SIG-
SIG-
1
SIG+
SIG+
EXC+
SEN+
SEN-
EXC-
SIG+
SIG-
SHIELD
7
6
3
2
5
4
1
LOAD
CELL
12.3 How to connect the platform
Disconnect the display unit from the power supply.
Solder the individual leads of the load cell cable onto the circuit board. See
diagrams below.
EXC+
56 KFB/KFN-TAM-BA_IA-e-1832
EXC-
12.4 Configure displ ay unit
12.4.1 Verified weighing systems (contacts of circuit board [K1] short-circuited by means of jumper)
For menu overview see chap. 8.2.
In verified weighing systems the menu item for calibration „P2 mode“ is blocked.
KERN KFB-TAM:
To disable the access lock, destroy the seal and actuate the adjustment switch.
Position of the adjustment switch see chap. 6.11
KERN KFN-TAM:
To override the blocked access you will have to destroy the seal before calling up the
menu and to short-circuit the two contacts on the circuit board [K2], using a jumper
(See chap. 6.11).
Attention:
After destruction of the seal the weighing system must be re-ver ified by an
authorised agency and a new verification wire/seal mark fitted before it can be
reused for applications subject to verification.
Call up menu:
Switch-on balance and during the selftest press .
Press , , subsequently, the first menu block
„PO CHK“ will be displayed.
Press repeatedly until „P2 mode“ will be displayed.
Operate the adjustment switch (models KFB-TAM).
Press and use to select the weighing scales type.
Single-range balance
Dual range balance
Multi-interval balance
KFB/KFN-TAM-BA_IA-e-1832 57
Example single range scales (d = 10 g, max. 30 kg)
Confirm selected weighing scales type by pressing ; the
first menu item „COUNT“ will be shown.
1. Display internal resolution
Press , the internal resolution will be shown.
Return to menu by .
Press to select the next menu item.
2. Position decimal point
Press , the currently set position of the decimal dot is
displayed.
Press to select the desired setting.
Options 0, 0.0, 0.00, 0.000, 0.0000.
Confirm input by .
Press to select the next menu item.
3. Readability
Press and current setting will be displayed.
Select desired setting by .
Options 1, 2, 5, 10, 20, 50.
Confirm entry by .
Press to select the next menu item.
58 KFB/KFN-TAM-BA_IA-e-1832
6.10.1 for linearisation
4. Capacity
Press , the current setting will be displayed.
Using the navigation buttons (see chap. 2.1.1) select the
desired setting, the active digit is flashing.
Confirm input by .
Press to select the next menu item.
5. Adjustment / linearization
Adjustment or linearization is required after entering
configuration data.
For carrying out adjustment see chap. 6.9.1/step 6 or chap.
KFB/KFN-TAM-BA_IA-e-1832 59
Example dual range scales (d = 2 / 5 g, max. 6 / 15 kg)
Confirm selected weighing scales type by ; the first
menu item „COUNT“ will be shown.
1. Display internal resolution
Press , the internal resolution will be shown.
Return to menu by .
Press to select the next menu item.
2. Position decimal point
Press , the currently set position of the decimal dot is
displayed.
Use to select the desired setting.
Options 0, 0.0, 0.00, 0.000, 0.0000.
Confirm input by .
Press to select the next menu item.
60 KFB/KFN-TAM-BA_IA-e-1832
3. Readability
Press , the display used to enter readability/verification
value for first weighing range will appear.
Press , the current setting will be displayed.
Select desired setting with and acknowledge by .
Press to enter the next menu item for
readability/verification value for second weighing range.
Press and current setting will be displayed.
Select desired setting w i th and acknowledge by .
Press , the unit will return to the menu
Press to select the next menu item.
KFB/KFN-TAM-BA_IA-e-1832 61
6.10.1 for linearisation
4. Capacity
Press and the display for entering the capacity for the
first weighing range will appear.
Press and current setting will be displayed.
Select desired setting with and acknowledge by .
Press to select the next menu item used to enter the
capacity for the second weighing range.
Press and current setting will be displayed.
Select desired setting with and acknowledge by .
Press , the unit will return to the menu
Use toselect next menu item.
5. Adjustment / linearization
Adjustment or linearization is required after entering
configuration data.
For carrying out adjustment see chap. 6.9.1/step 6 or chap.
Acknowledge using , the current setting is displayed.
Acknowledge by , select desired setting with
= Adjustment
= Linearisation
62 KFB/KFN-TAM-BA_IA-e-1832
Press repeatedly to exit menu.
12.4.2 Non verifiable weighing systems (contacts of circuit board [K1] not short-circuited )
+ For menu overview see chap. 8.1.
Call up menu
Switch-on balance and during the selftest press .
Press , , subsequently , the first menu block
„PO CHK“ will be displayed.
Press repeatedly until „CAL“ will be displayed.
Press , the first menu item „COUNT“ will be displayed.
Navigation in the menu
With help of , the individual menu items can be
selected one after the other.
Confirm selected menu item by pressing . The current
setting will be displayed.
To change to the available settings, press the navigations
keys as described in chap. 2.1.1.
Either save by pressing or cancel by pressing .
KFB/KFN-TAM-BA_IA-e-1832 63
Parameter selection
1. Display internal resolution
Press , the internal resolution will be shown.
Return to menu by .
Use to select another menu item.
2. Position decimal point
Press , the currently set position of the decimal dot is
displayed.
To make changes using the navigation keys (See chap.
2.1.1), select the desired setting. Options 0, 0.0, 0.00,
0.000, 0.0000.
Confirm input by .
Use to select another menu item.
3. Weighing scales type, capacity and readability
Press and current setting will be displayed.
Select desired setting by .
„off“ Single-range balance
„on“ Dual range balance
Press to confirm, the display for entering readability (for
dual range scales for the first weighing range) appears.
Press , the current setting will be displayed.
64 KFB/KFN-TAM-BA_IA-e-1832
Select desired setting with and acknowledge by .
Press , the display for entering capacity will appear (at
dual range balance for the first ra nge).
Press , the current setting will be shown (such as max. =
2000kg).
Using the navigation buttons (see chap. 2.1.1) select the
desired setting, the active digit is flashing.
Acknowledge with .
In a single-range balance the entry of capacity / readability
is finished.
either in single-range balance
Press , the unit will return to the menu Press to call
up next menu item „CAL“.
or
In a dual range balance enter readability/verification value
and capacity of the second weighing range.
Press , the display for entering the capacity of the
second weighing range will appear.
Press , the current setting will be displayed.
Using the navigation buttons (see chap. 2.1.1) select the
desired setting, the active digit is flashing.
Confirm input by .
KFB/KFN-TAM-BA_IA-e-1832 65
6.10.2 for linearisation
Press , the display for entering the readability of the
second weighing range will appear.
Press , the current setting will be displayed.
Select desired setting w i th and acknowledge by .
Press , the unit will return to the menu
Press to call next menu item.
4. Adjustment or linearisation
Adjustment or linearisation is required after entering
configuration data.
For carrying out adjustment see chap. 6.9.2/step 4 or chap.
Acknowledge using , the current setting is displayed.
Press to confirm, press to select the desired
setting
noLin = Adjustment
LineAr = Linearisation
66 KFB/KFN-TAM-BA_IA-e-1832
13 Annex
13.1 Dimensions Support base / wall bracket
KFB/KFN-TAM-BA_IA-e-1832 67
14 De c laration of Conformity / Examination Certificate
To view the current EC/EU Declaration of Conformity go to:
www.kern-sohn.com/ce
The scope of delivery for verified weighing balances (= conformityrated weighing balances) includes a Declaration of Conformity.
68 KFB/KFN-TAM-BA_IA-e-1832
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